Add utils

plugin/src/utils/hash.ts

@@ -0,0 +1,9 @@
+// https://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript
+export function hash(content: Uint8Array): string {
+	let hash = 0;
+	for (let i = 0; i < content.length; i++) {
+		hash = (hash << 5) - hash + content[i];
+		hash |= 0; // convert to 32bit integer
+	}
+	return hash.toString(16);
+}